Stovepipe



J. L. HEMP.

STOVEPIPE. APPLICATION FILED mAYn. 1915.

Patented Aug. 19, 1919.

\NVENTOR WH'NESSES JOSEPH ATT'YS.

citizen of the United UNITED STATES JOSEPH L. HEMP, OF ST. LOUIS,MISSOURI.

STOVEIIPE.

To all whom it may concern:

Be it known that I JOSEPH L. HEMP, a gtates, and resident of St. Louis,Missouri, have invented certain new and useful Improvements inStovepipes, of which the following is a specification containing a full,clear, and exact description, reference being bad to the accompanyingdrawings, forming a part hereof.

My invention relates to improvements in stove pipes, and the object ofmy invention is to construct a simple, inexpensive and easily operatedstove pipe seam, which may moved, of a stove pipe section constructed belocked without the employment of ex traneous means. I

With'the above object in view, 1ny'inven tion consists in certaindetails of construction and arrangement of parts hereinafter fullydescribed pointed out in my claims and illustrated by the accompanyingdrawings, in which 1 Figure 1 is an elevation, with a part reaccordingto my invention;

Fig. 21s a fragmental cross section taken on the llne 2-2 of Flg. 1 lookng toward the right; and

Fig. 3 is a view similar to Fig.2, taken on the line '33 of Fig. 1looking toward the right; and Fig. 4 is'a detail longitudinal sectionalelevation showing the crimped end bent inwardly. Fig. 5 is a perspectiveview of my stove pipe section illustrating the preliminary method ormanner of locking the edges of the Stovepipe together, and

Fig. '6 is a fragmental perspective of one end of the stove pipe sectionillustrating the subsequent operation in looking the edges wherein oneflanged edge 'is partially inserted through the nortch formed in theopposing edge.

Referring ing drawings,

5 designates the stove pipe section formed from a single sheet of metal.Formed on one margin of the sheet there is an outwardly bent flange 6,which extends throughout the stove pipe section, and formed on theopposite edge of the sheet there. is an inwardly bent flange 7 saidflanges being adapted to be engaged or interhooked, as is common.

The pipe section bears the usual beads 8 near its ends for the purposeof limiting the extent of telescoping of sections of pipe and at the oneend the sheet is longitudiby numerals to the accompany- Specification ofLetters Patent. Patented Aug. 19, 1919.

Application filed May 17, 1915. Serial No. 28,620; i

n'ally crimped to slightly taper the pipe to facilitate the telescoping.

e In the margin of the sheet intersecting the flange'o, between the bead8 and the end of the sheet which is longitudinallyv The crimped, thereis formed'a notch 9. notch 9 answers as aseat for the opposing flangededge 6" of the stove pipe section, said At the end of'the sheet oppositethe longitudinal crimps' and notch 99, parallel with and laterallyspacedfrom the flange. 6 is a shoulder 10, which israised tothe plane ofthe overlying portion of the flange to pro duce an abutment'againstwhich the opposite flange bears to prevent sectional relative movementsof the flanges.

It will be understood. from this showing that along one margin the stovepipe section has an inwardly benxtflangf'? of hook format 10n whichextends from one end of the section to the 'notch 9, said flangeterminating at the notch. Beyond the notch a portion.

of the stove pipe section (as shown by dotted'llne in Fig; 1) projectswhen the pipe section is locked beneath the opposing flanged edge of thestove pipe section. The opposing or opposite edge of the stove pipesection is provided with an outwardlybent flange 6 which extendsthroughout the-section, the said flanges 6 and 7 adapted to be hooked together for locking the stove pipe section; Onthe end of the Stovepipesection opposite to the end in which the notch 9 is formed, I 'form ashoulder 10,'against which the opposing edge of the stove pipe isadapted to, abut whenthe' fianges are hooked "or 'placed in the lockedposition. In order to lock the stove pipe section together, the stovepipe section is twisted until the end of the side carrying the flange 7passes the shoulder 10, then the flanges are hooked together, one edgeof the stove'pipe section resting against the shoulder 10 and the edgeof the section carrying the flange 6 being inserted over the portion ofthe pipe beyond the notch 9. 'When the stove pipe section has beenassembled, one end is prevented from collapsing by means of one edge ofthe section resting in the notch 9 and the other end is prevented fromcollapsing by been locked- PATENT, [OFFICE- one edge resting against theshoulder 10, thus afiording an eflective lock for both ends of the stovepipe section. In Fig. 2 I have shown a cross section of the seam orjoint when the stove pipe section is locked, illustrating one edge ofthe section abutting against the shoulder 10, and in- Fig. 3 I haveshown a cross section of the'seam when the section is locked, showingone edge of the stove pipe section lying in the notch 9 and over theportion of the pipe beyond the notch 9.

In Figs. 5 and 61 have illustrated the method of assemblingthe sectionand looking the edges together. The first operation as illustrated inFig. 5. is to twist the section in helical fo-rmand engage the flanges6, and 7. When this has been done, the o posing flanged edge is passeddiagonal y through thenotch 9 and theopposite end passed behind'theshoulder 10.. From this construction it will be observed-that both endsof the stove pipesectio n will be prevented from: becoming unlocked bycompression. In order topass the opposing flanged edge diagonallythrough the notch 9, it is preferable to slightly spring inwardly theportion 11. In Fig. 6 I have shown the flanged edge partly insertedthrough the notch 9. V 1

As shown by Fig. 4:, the end-margin of the section, next the crimpedportion, is bent inwardly as at 10? to facilitate introducing thecrimped end into a second section.

, Having thus described my invention, what I claim as new thereln anddes1re to secure by Letters Patent of the United States is which theopposing edge is'adapted to rest and provided on the opposite ,marginwith an inwardly turned hook-flange of less length than thefirstmentioned flange and with a notch'cut beyond the edge of theinturned flange, the portion of the pipe section of the end adjacent thenotch, being inwardly bent, the margins of the section beingfastenedtogether by twisting the section in helical form and engaging theflanges so that the flanged margin of one .end may be inserted in thenotch and over the inwardly bent portion and'the opposite flanged marginmay be positioned behind the outwardly formed shoulder whereby thesection is assembled for use without any other operation.

2; A stove pipe section formed from a single piece of sheet metalprovided along one margin with a continuous and unbroken outwardly benthook shaped flange and on one end with an outwardly formed shoulderadjacent to and parallel with the edge of said flange againstwhich theopposing edge is adapted to rest, and provided on the opposite marginwith an inwardly turned hook shaped flange of less length than the firstmentioned flange and with a notch inwhich the opposing edge is adaptedto be seated, a portion of the pipe section of the end adjacent thenotch being inwardly bent and positioned beneath the opposing flangewhen the flanges are engaged, the wall of the notch and the inwardlybent portion adja cent said notch preventing the unhooking of theflanges by compression at one end of the pipe section, and the outwardlyformed shoulder preventing the unhooking of the flanges by compressionat the opposite end of the section, said flanges being capable of beingengaged by giving the stove pipe section' a helical form so that the endmargin of one end of the section may be seated behind the shoulder andone end of the opposite margin may be positioned within the notch.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

JOSEPH L. HEMP. Witnesses:

E. L. WAILACE, JOH 0.1I1GDON. 7

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

